docs

README.md

@@ -1,3 +1,32 @@
-# validate-json-by-json-schema-action
+# Validate JSON by JSON Schema Action
 
-A GitHub Action to automatically validate JSON files using their $schema reference.
+A GitHub Action that automatically validates JSON files using their `$schema` reference. The action extracts the schema URL from the JSON file, downloads it, migrates it to the latest version, and validates the JSON against the schema.
+
+## Usage
+
+```yaml
+- name: Validate JSON file
+  uses: your-username/validate-json-by-json-schema-action@v1
+  with:
+    json-file: "path/to/your/file.json"
+```
+
+## Inputs
+
+| Input       | Description               | Required | Default |
+| ----------- | ------------------------- | -------- | ------- |
+| `json-file` | The JSON file to validate | Yes      | -       |
+
+## How it works
+
+1. Extracts the `$schema` URL from the specified JSON file
+2. Downloads the schema from the URL
+3. Migrates the schema to the latest version using `ajv-cli`
+4. Validates the JSON file against the schema
+5. Exits successfully if validation passes, fails if validation fails
+
+## Requirements
+
+- The JSON file must contain a `$schema` property with a valid URL
+- The schema URL must be accessible via HTTP/HTTPS
+- The action uses `ajv-cli` for validation with `--strict=false` mode